Device for balancing bodies having a rising and falling movement



Oct. 27, 1931. H. R. WEBB ET AL 1,829,594

DEVICE FOR BALANCING BODIES HAVING A RISING AND FALLING MOVEMENT Filed June 8, 1929 2 Shees-Sheet 1 1 --------1 i 6 g, i M l 7% W pct, 27, 1931. H. R. WEBB ET AL. 1,829,694

DEVICE FOR mmmcme BODIES HAVING A RISING AND FALLING MOVEMENT- Filed June 8, 1929 2 Sheets-Sheet 2 If III/r "1c members.

v 40 the nature oflthis invention'reference will Patented 1931 i i 1 HARRY; nILnYwnBB AND HARRY NEWTON WEBB, or GRANTHAM, ENGLAND DEVICE non BALANC NG "BODIES A ING .A Basins Ann EAL-LING MOVEMENT 1 Application filed Julie 8, 1929 semi Kansans, an in Great Britain February 5, 192a.

' This inventioncomprises a device forbalancing bodies having a rising andfalling "movement, andh s; forits object to provide simple and .eflicacious means whereby a body 7 adapted-for a verti'cally sliding or arising and falling 'm'otionis balanced and maini tained in equilibrium at any position "in its movement without the employment of bal- 1 since weights, locking catches or gripping According to the present invention weight w balancing means are provided comprising, in ,icombin'ation, the body to be balanced, the

weight of said body exerting a force of-constant magnitude in one direction, means for exerting a second force opposed thereto, the moment ofvsaid second force'varying in mag- 'nitude in accord ance' with the position of the body in its traverse,'and compensating means 9 functioning to maintain-at all positions of the body "in its'traverse constant'equilibrium of the "opposing forces and consequently a bal- Y ance of the "traversablebody; v Conveniently the invention'embodies a roe V jtatably mounted member, su ch as a roller, y p as applied to a vertically sliding window I "pulley orit's equivalent, means whereby the traversable body is adaptedto exert a moment tending to rotate said roller or the like in one direction, spring or elasticmeans exerting an opposing'moment tending to rotate the roller 01- the like in an opposite direction, said springexertinga force of constantly varying magnitude during the motion of the rising *and falling body, and means whereby'the opposingmomentso-fforce are maintained in equilibrium at all positions occupied by the traversingbody in itsmovement.

For the purpose of more fully describing "now be made to the accompanying drawings,

wherein 1 Figure 1 illustrates in front elevation a vertically sliding window with balancing means according to this invention applied thereto.

'Figure'fz is an enla AA of Figure 1.

rged vertical section on Figure 3 is an enlarged detail View of part of the arrangement shown in Figure 1.

Figure 4 s a front elevational View of a slidingwindow showing a m 'rotatably' mounted rollers odified arrangement of balancing means] Figure 5 is an enlarged part-sectional view of part of Figure 4.

tion a vertically traversa-ble body is connected directly or indirectly to one or more flexible inextensible 'cords, wires or the equivalent whichis or are caused to encircle one or more pulleys or the like carried by the body.

The moment of the force exerted by the weight of the-body that is to be counterbalancedtends to rotate the roller or the like in one direction against the resistance of spring 'means which tend to effect rotation in an opposite'direction, and it will be appreciated that the force exerted by saidspring will vary in accordance with the position occupied by the body in its traversing movement.

A particular embodiment of the invention suitable for use in automobiles 'will now be described by way of example, reference being made to Figs. 1, 2 and Within-the side members of a suitably channelled frame 6 is slidably mounted a window 7 which may carry at its lower edge '12 fixed to the window frame or a part rigidly secured thereto at a in the width thereof.

To thefsaid spindle 1 0 or parts thereon at each side of the aforesaid end connections of wire 11 is anchored the one end of each of two further wires or cords 13, each wire extending downwards over and being connected to one of a pair of rotatable drums l4.- suitably mounted on fixed brackets 15 or otherwise to the'window frame or a member position centrally V securedthereto'at or'near'its lowermost part. c

These drums 14 are located on each side I of and equally spaced from the'centre of the -width of the frameiand each drum contains a coiled spring of: suitable strength having one end connected tothe drum axleiand the other to the drumfitself soas to transmit ro-f tary I m n "to s id drumt I t is Way? I 'continualtension or downward pulling et- 14 are-rotated, the upper'wire 11 becoming I ther from the axis a and action is obtained.

yposedzatgoneside of said-spindle axis a and I removed therefromtothe extent of the radius II 1 vof the spindle" Inorder to balancethewindow, the point 0 at which. the pulling effort isiexerted on the spindle is disposed still furin this way a lever 7 As the window is lowered, thespring drums uncoiled from the spindle 10 and rotating] saidcspindle in adirection to coil the lower I wires-13 ,on to samey andduring this motion the' pulling efl'ort of the springs increases. This increased pull-would normally-tend .30

again to raise the window, and in order, -there- Qfore, that the varying'eliorts' of-the springs 7 i, are 1 not transmit-ted directly to the window,

- and that the latteris maintainedbalanced [at all positions of its jtravel, means are pro-H vided whereby the variation in 'the force'e'xerted by the springs is compensated by auto- ,manenn varying the, moment thereofjas transmitted totheWindow. p i I One method ofaccomplishingithis is by causing the point Ccflt which the lower wires 13 pull upongthe spin'dleto move gradually w to'wa'rdsior'away from the axis of the spindle 10 as the pull of the springs increases or de-V creases,. that is to say as the window is low- ,ered or raised. This may be eiiected by'formfinger securing onithe spindle 10 a tapering or part-conical member 16, the degree'of taper of which is dependent upon the type r and strength ofspring 14:; the lower wire 13 beingwound on to said taperedmember in such amannerthat asthewindo'w is lowered and the pull of the spring isincreased by a wound upon a.progressivelydecreasing dis mg POlIltfQOf sa1d wlre moves'towards the tighter coiling thereof, the wire becomes ameter of the taperandconsequently the pullf 'axis 'of the'spindle and the'leverage is re duced, The formation of the tapered mem berisf'thu's so" arranged? in relation to the strength of the spring that the window is balancedand-canbe displaced withequal'facil ity at any positionin thefextent. of itsmovementg The spindle, ilO with tapered parts thus constitutes a floating or treelysu'spended difduced by the springs other: than nected to its opposite end I I Y j In' an alternative, and the preferred aras at 18.0 to-the'spindle andjat its to the cvlinder sweat-18b. f

ferential or compensating device, and the forceof the'spring is in no way retarded by r acting through bearings, therebeing no bearings other than the members 9 which simply .4 function as guid'esfor the spindle and may if desired be only half-round or channel-shaped .1 T p rt a ryi th upp P l ey 12 andthe spring drumsl lfiare preferably connected by one or more rigid frame members "such for example as asingle vertical central I "member 17 which'may be or channel or other 7 I angular SectionfOr strengthgand it is to be i noted that this rigidmember at every position of the window takes all'th'e strain pro 7 that necessary to balance the window.

placed position andjpreventedfrom uncontrolled inovement by vlbration, one or. more parts of the spindle 1Q and/or taperedmembers'lo'n aybe so .designed'as to give differ- .ent jpulling :forcesiat different vpositions in 1.the circumference thereof, so that at one part ot -arevolution there is a tendency forthe window to be raised while at another part of-the revolution there is atendencyto lower said window. Oneway of accomplishingth'is is by forming the tapered' membeis16"ot elliptical cross section; thuswhen the pulling point 0 is at the one end of theglarger diameter of the ellipse- -thelwindow may. inove up slightly until the said-pulling point 'c coincides withthe. smaller diameter when the spring elio'rtwilltend to lower the window. This efi e'cto may also-be producedlby sections other than elliptical, such for exe ample as approximately. triangular or other I Any other suitable type of spring or elastic 'bodymayreplace the spring" drums 14 such yrfor, eXample-ascoiled tensionwsprings each. 'c'onnectedat'its one end to a suitable part of the rigidfframe andhaving a wire-conrangement', illustrated in} Figsge, 5 and 6. the springdrumsare dispensed with'and in place thereof'coiled' springs 18 are-provided which are'enclosed within cylindrical membersf19 and serv'eto, connect said members 1 ,to the differential or'compensatinq spindle 10a. each spring being secured'at its one end other end In this arrangement the cvlinders19constitute;parallelportions of the diflerential,

and'to each cylinder is connected the flipper end of a downwardly extendingwire or cord 13. eachv ofwhich is -ianchored; at its lower end to one of a .pairot hooks or their To-provide further S l f i y t z Will; I jdow, or the like is maintained in any desired polygonal or eccentricshape, or a chain memberHmav be employed, the links of which cause thepullingforc'es toi be exertedat differing angles upon the tapered members. I

' 12 mounted on the rigid member 1 7or' other being of wire or cord, are inextensible,

In operat1on, the downward motlon of equivalent fastened to the "frame or 'other rigid' stationary part. i a

I I the. spindle 10a intermediatexotf the {spring cylinders 19 isformed or securedtwo .tapere'd portions'2l which constitute theother parts of the differential, a wire or ,cord 11 being secured at a position between the two tapered parts "21and extended upwardly from same over a small pulley or the like suitable part; The last-named wire 11 con- :stitutes the means whichlthe spindle 10a and window 7 are isuspended' as before-described;

It will be understood that the flexible connecting means, described and represented as the window causesthe suspension wire 11 to become uncoiled fromthe tapered parts "21 and'the wire 13 'ooiledi'on to the parallel parts 19 of the spindle, andthe d-iiterence inthe diameters ofsaid partslwill of course etl'ectv a quicker rotation of the latter than the former. iThis' exerts tension on the springs which tension increases or decreases in: accordance with the ment of the window.

In this modification the tapered parts are advantageously offelliptical cross section or other suitable non-circular section for the purpose previously set forth.

In a further embodiment of the invention (Figure 7)1asingle hollow cylinder 190iv with" enclosed lispring.connectingisame to the spindle lObis assembled centrally pension wire 11 extending up from the Itapered portions 21a advantageous/hi passes over'two suitably spaced pulleys 12a or the like. The operation of this embodiment is similar to that of the last described arrange- .ment. 1 V I It will be appreciated that apparatus employed in carrying out the invention may be modified in ways other than those previously described without 'dep'arting'from the scope of the invention For example, the" two ta- "pered portions 21 (Figure 5) may in some 111- stances bereplaced by a parthaving a single taper in fact one or mores rin drums or i p b of a spring the effective force of which vvacylinders and one or more taper portions or cones may be placed in various positions relatively to each other on the differential spindle so long as the tension on the wires or cords maintains said spindle at right angles to the direction of said tension.

' It will be appreciated that at all times the efiort of the spring or springs in excess of that required toibalance the window or the likeis received between the stationary points direction of move the body.

or positions at whic'hthe upper and lower -fiexible members 11 and 13 are connected or anchored.

' While the tapering of the portions of the differential is of considerable advantage and may in some instances be found necessary for eifective operation, it is to be understood that occasions may'arise when same would not be required, as for instance where only the elliptical cross sectional shape of the r0- tatable spindle carried by the traversing body is utilized without the tapering'feature. r

The-term traverse, and its derivatives, is employed throughout this specification to designate, by a single word, that the body to be counterbalanced is bodily movable to and fro in a determined-path.

'We.claim:

1. A device for balancing bodies adapted for ia-rising 'and falling movementby means of an inconstant balancing moment, comprising a compensating spindle movable with the body to be balanced, inextensible flexible connecting means adapted to be wound onto or from said compensating spindle on movement of the body to be balanced, a stationary member to which the free end of said flexible connecting means is secured, means for applying a balancing moment to said compensating member and means whereby equilibrium' is attained between the opposing moments through the range of movement of 2. A device for balancing bodies adapted for a rising and falling movement by'spring means the effective opposing force of which varies throughout the range of movement of the body to be balanced, comprising a compensating spindle rotatably mounted below the body and movable therewith, inextensible'flexible means connecting with a relatively stationary point and wound onto or from the compensating spindle to cause rotation of the latter on movement of the body, means whereby the spring action tends to cause rotation of the spindle to lift the body, the spindle having coned portions onto which flexible connecting means may be progressively wound in order to compensate for variations in the balancing force of the spring.

'3. Adevic'e for balancing bodies adapted for a rising and falling movement by means a any member, 7 @further Jiflexible connecting force maybe appliedtol the. v difl'erential spindle; the spindle; having coned' portions ipoacting.withonefoisaid flexible connecting V :flexible means; adaptedtobe. woundonto or means for compensating for varying. spring forces;- saidconed portions vbeing of 'ellipti- I cal-section in order that equilibrium between J Q theaiopposing moments may be attained at I e successive positions f in the movement ofgthe i 4:. "A device for balancing bodies adapted lfOI rising and falling. movement, comprising a-compensatingspindle movable with the .mbOdyf' t-O be i balanced, a *spfringsinfiuenced' drummotatable 1011 said compensating spin- 1 die, inextensible' flexible e connecting .means; 2 "woundonto or from said drumonmovement j of the bodiyaand secured t'o stationary mem- Lgbers below the abodyyfurther flexible means .Jwound onto the compensating spindle conn'ectingswith a stationary point above the body? and means .i wherebyv I equilibrium-"between the opposing moments is attained ...through the range of movement'oifthe'body;

e f ,5.fJA;"devi'ce f0r balancing bodies adapted gfrom said drum on displacement ofthe body g for arising and falling movement, compris-e.

ng a compensatingspindle displaceable inconed portlons being o f elllptical sectlon whereby equilibrium between i the opposing unis'on with abody to be balanced, apluralitv of spring influenced drums rotatably mounted on}sa1dcompensating sp ndle, inextensible *"jzfi'exible means adapted to be wound onto. or

' and' connecting with a stationary point below saidibodyand further. flexible means, adapted ion displacement ojfthe body to-b'e wound-onto or from progressively varying diameters on said compensating spindle and iconne'ctingi v the we ght of the body tendsto causero -.at1on i. i with astationary point above said-spindle 1 rangeof movement oftthe body."

lion a rising and falling movement," comprismg a compensatlngspindle rotatably mount whereby equilibrium may be attained v between theopposing moments throughout the 6. A device for balancing bodies adapted ed below vthe body to be balanced; and displace lble therewith, two spring influenced; drums one being arranged towards each" end V ing with] stationary membersbelow such "body, the spindle havingtwo con-ed -portions 55 arranged between 3 said o spring-influenced drums "onto which further flexible members i maybe wound on displacement of the'body, c" said flexible members connecting with a stathereon, Y inextensible afiexible' .me ans adapted .7 to be .wound onto or from said drums on dis "placement-of, the body and fconnecting with stationary points below suchbody -further fromeonedportions .of s'aid spindle on dis: placement ofsthe body and connecting to a stationary point above said spindle, said coned portions being of elliptical section wherebyequilibrium. between the opposing i moments canbe attained at successive positions. throughout the range of movement of the body to be balanc'edif r I 8. A. device for balancing bodies adapted for a risingand falling'movement comprising 'a'compensating :spindlezdisplaceable with'fthe body, to: be balanced; two 1 spring-influenced drums rotatably, mounted on said spindle one beingarrangedtowards each end thereof, inextensible fiexiblemeans adapted to be wound onto orfrom said-drums ondisplacement of the body and connecting with stationary Zmeans below sushi-body, further flexible means adapted on displacement of the body to bewoundonto or from two coned portions disposed on said compensatingspindle-be tween said two spring-influenced drums, said moments can be attained "atsuccessive position'sin the movement of the body. 9; A device for'balan'cing apbody adapted forrisingrand falling movement, comprising a spindlerotatively mounted and movable with :the body, in'extensibl'efiexible means connected with a-relatively stationary support andwound onto the spindle whereby of the spindle, spring mechanism connected withthe spindle and tending to' cause it to rotate in opposition to therotation caused by the'weight of the body a drum-like part, car

ried by the spindle, and other flexible means having winding connection with the said drum-like part and also with a stationary-attachment, the part of the drum-like part on which the flexible means is wound being noncircular" in cross section, whereby the'efiectiveness of; the springto rotate the spindle is materially different during difierent parts o1"- a single rotation of the .saiddrum-like part substantially as and for'the purposes 7 HARRY R ILEY J VEBB,

, HARRY-NEWTON B,

set-forth.

""tionary point above said compensating meoh- :3

9 anism, whereby equilibrium between the op v posingmoments may be attained throughout the'rang'e' of movement of the body. I

f7devic'e for balancing bodies. adapted A 

